Dnsr Notes 25 Word Scramble
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Question | Answer |
What percentage of dinosaurs are now extinct? | 99.9% |
How long did dinosaurs thrive for? | 150 my |
How many species of dinosaurs exist today? | 10,000 |
How does background extinction compare to mass extinction? | Background extinction continually occur and are isolated extinctions. Mass extinctions occur great and small but are still substantial events. |
What are the five mass extinctions? | End-ordovician, late devonian, end-permian, end-triassic, end-cretaceous |
When was the end-Ordovician? | (445 Mya) |
Late Devonian? | (374 mya) |
end-permian and what percentage went extinct? | (252.5 mya) 80% |
end-triassic | (201.5 mya) |
end-cretaceous | (65.5 mya) |
What was the K-T extinction? | Cretaceous-tertiary |
What are the three main hypoth |
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Chelseagirl2508
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